背景
都说不要造轮子,但是青柠认为,有的时候,造个轮子,更有助于清楚详细的业务逻辑,所以咱也自己写一个轮子,搞个系统开发。大体思路就是先搭建基础框架,然后细写业务逻辑,会涵盖主流的中间件,数据库,框架等。
一、新建一个SpringBoot项目my-spring-boot-starter
项目目录结构如下:
二、项目依赖文件
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.6.7</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.qnbc</groupId>
<artifactId>qnbc-boot-start</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
三、resources目录下添加目录META-INF下的文件spring.factories
org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.example.myspringbootstarter.MyServiceAutoConfiguration
读者可以查看SpringBoot自动配置原理,即可明白此处配置。此处MyServiceAutoConfiguration类为配置类,并将MyService交给Spring管理。
四、编写代码配置类和测试接口
public class MyService {
public String hello(String name){
return "Hello "+ name + " !";
}
}
@Configuration
@ConditionalOnWebApplication
public class MyServiceAutoConfiguration {
@Bean
public MyService hello(){
return new MyService();
}
}
五、新建测试工程,引入自定义starter的依赖
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.qnbc.test</groupId>
<artifactId>qnbc-boot-test</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>com.qnbc</groupId>
<artifactId>qnbc-boot-start</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>
</project>
此处引入自定义的starter依赖(使用Maven工具install原starter项目):
<dependency>
<groupId>com.example</groupId>
<artifactId>my-spring-boot-starter</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
说明:引入自定义starter后,在项目的依赖下可以查看到:
六、编写测试类
@RestController
public class TestController {@Autowired
private MyService myService;
@GetMapping("/hello")
public String hello(@RequestParam(value = "name") String name){
return myService.hello(name);
}
}
七、启动测试项目并测试
至此,封装自己的SpringBoot starter成功!
总结
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